Submission #396129

#	Time	Username	Problem	Language	Result	Execution time	Memory
396129		pure_mem	Bitaro’s Party (JOI18_bitaro)	C++14	0 / 100	3 ms	4940 KiB

bitaro

#include <bits/stdc++.h>

#define X first
#define Y second
#define MP make_pair
#define ll long long

using namespace std;

const int N = 1e5 + 1, BS = 300;            
const ll INF = 1e18;

int n, m, q, used[N], dp[N];
vector< int > g[N];
vector< pair<int, int> > gg[N];

int main () {
	ios::sync_with_stdio(0), cin.tie(0), cout.tie(0);
	cin >> n >> m >> q;
	for(int i = 1, x, y;i <= y;i++){
		cin >> x >> y;
		g[y].push_back(x);	
	}
	set< pair<int, int> > act;
	for(int i = 2;i <= n;i++){		
		act.clear();
		for(int from: g[i]){
			if(used[from] != i)
				used[from] = i, dp[from] = 1, act.insert(MP(1, from));
			for(pair<int, int> tmp: gg[from]){
				if(used[tmp.Y] != i)
					dp[tmp.Y] = 0, used[tmp.Y] = i;
				if(tmp.X + 1 > dp[tmp.Y]){
					act.erase(MP(dp[tmp.Y], tmp.Y));
					dp[tmp.Y] = tmp.X + 1;
					act.insert(MP(dp[tmp.Y], tmp.Y));
					if(act.size() > BS)
						used[act.begin()->Y] = -1, act.erase(act.begin());	
				}
			}
			while(!act.empty()){
				gg[i].push_back(*act.begin());
				act.erase(act.begin());
			}	
		}	
	}
}

• Subtask 1: 0 / 7
• Subtask 2: 0 / 7
• Subtask 3: 0 / 86